Because the framework is no longer supported, the official download page now returns a 404 error, and it is . Why You Can No Longer Use Silverlight
Silverlight reached its final "End of Life" status in late 2021, meaning no further development or bug fixes will occur. What to Do Instead download silverlight
Since Microsoft no longer provides security updates for Silverlight, continuing to use it (even if found on third-party sites) poses a significant security risk to your computer. Because the framework is no longer supported, the
If you are a developer or an organization still using Silverlight-based apps, it is critical to migrate to modern frameworks like Blazor or HTML5/JavaScript . Summary Table Official Support Status Ended October 12, 2021 Official Download Unavailable (404 Error) Browser Support None (Chrome, Edge, Firefox unsupported) Recommended Action Uninstall immediately If you are a developer or an organization
Microsoft recommends that users uninstall Silverlight from their systems to ensure security.